Carbureter.



W. OTTAWAY.

GARBURETER.

APPLICATION FILED APR 14, 1913.

Patented Aug. 4, 1914.

\ A M12702? (072' flfl/zym 057025617 UNITED s'r TES PATE'N FFICE.

WILLIAM OTTAVVAY, 0F AURORA, IIQLINOIS, ASSIGNOR TO AURORA AUTOMATIC MACHINERY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CARBUEETER.

Specification of Letters Patent.

Patented Aug. 4, 1914' To all whom it may concern:

Be it known that I, WILLIAM O'ITAWAYT,

ings. and to the letters of reference marked.

thereon, which form a part of this specification.

This invention relates to carburetors and means for conveying combustible fluid from the same to the cylinders of multiple cylinder internal explosion motors, and more especially to the means whereby the introduction of combustible fluid to each cylinder of the molor may be separately regulated, so that firing will occur in each cylinder alike, or the explosions in the various cylinders will occur with uniformity and regularity and in such a manner as to obtain the highest degree of efficiency.

The principal object of the invention is to provide a simple, economical and (-llicient carburetor and means for conveying and regulating the supply of combustible fluid from a carburcter or source of lluid supply to the cylinder or cylinders of an engine.

Other and further objects of the invention will appear from an examination of the following description and claims and from an inspection of the accompanying drank ings.

The invention consists in the features, combinations, and details of construction herein described and claimed.

in tho accompai'iying drawings, Figure 1 is a view in ccntral vertical section oia carburetor and manifold constructed in accordance with my in'iprl'wcments; Fig. 2, a detail view in horizontal section, taken on line 2 of Fig. 1 looking in the direction of the arrow, and showing a plurality of tubes forming auxiliary passages r conveying the combustible fluid to the cylinders of a motor, and the means for controlling the passages formed by such tubes; and Fig, 3.

a dctail View in horizontal scction, ta-Kcu on line 3 of Fig. 1, showing the tubular or sleeve valve mechanism and the inner casing or tube by whi h the tubular va'lrc'nicclr proved manifold or means for conveying combustible field from a cai'bureter to the cylinders of a multiple cy'linder interfiiil combustion motor is shown in combination with or so constructed as to forma artiif a carburetor made in accordance with my invention described and shown in a pending application Serial No. 745,318, filed January 31, 1913, for an improvement in carbureters.

In" order to enable this invention and the construction and mode of o eration of a device embodying the same to e readily unclerstood so as to enable those slaiiied in the art to make and use the invention, it is here shown and will. he described in connection With a" carburetor of the type-:demribed and shown in said co-pending application. It will, however, be readily understood by thos skilled. in the art that the manifold; or

proved means herein described and shown,

for conducting the combustible fluid or mixture. from the mixing chamber or carbureter to the cylinders of a multiple-cylinder iniornal combustion engine or'motlor is adapted to be used in connectioriWi-th any'desired type or form of carbureter or device, for inicrmixing hydrocarbons and air in such proportions to form a suitaiile combustible llnid for use in connection with 'ihternalcomljnstion engines or motors.

In constructing a device in accordance with my invention and in1pr0ven1ents,"I' pro-- vule a casing a having an inner tubular por-- tion or inner casing walls; b encircled by the outer casing or walls and farming therewith an'annularfloat chamber 0 in which is located an annular float d. The float shown in the drawings is in the form ofa' hollow,

annular shell which. encircles the inner 0215- ing portion and is encircled by'the'outer casing c and adapted to move or float freely upward and downward within the casing 01' float chamber. An annular bottom casing portion a, which may be made in one integral piece with the outer casing ortion or Walls a, forms the main bottom of the casing and float chamber and is provided with an upwardly extending, screw- ;thrcaded flange f in screw-tln'eaded engagement with the screw-threaded hotter end of the inner erasing member or tube 1, shown in 1. A cover 9 of annelzar construction'enereles the upper portion lthe inner cas ng or tube member 32 andisse cured thereto and to the outer casingmeiln till chamber 0, as shown in Fig. 1.

her a in any desired suitable manner.' The upper portion h of the inner casing or tube 6 projects through and upward beyond the cover member 9 and is provided with outer slred, ordinary or well known form, A feed tube 'n forming a combustible fluid or hydro carbon supply passage 0, is mounted in position to extend upwardly on the inside of the inner casing member or tube b and )8 supported by means of a supporting member" or tube body portion p having radial arms q which are secured to the casing bottom a by means of screws r or other similar securing means. And a casing bottom or sub bottom 8 having side wall portions tis mounted beneath the annular casing bottom member 6 and provided-with a central apergure through which the lower end of the cod tube may project The lower projecting end u of tho-feed tube is provided with inner and outer-screw threads, and a nut 'v is mountedin threaded engagement with the outer screw threads of this downwardly pro jecting end portion of the feed tube and in supporting engagement with the bottom member 8 so as to securely hold the tube and said bottom member in positionand in rigid engagement with each other. A plug 111 is mounted in threaded engagement with the bottom end of the tube and forms a closure for the same. The bottom member s with its side walls t forms-an air reservoir passage or space 3 andis provided with one or more air supply passages z communicating with said space. A suitable screen 2 'of reticulated material or wire netting is mounted on the interior of the passage, res ervoir, 'or compartment (1 in position to admit air to-and exclude. dust, sand, grit, and other foreign substances from the interior of the carbureter or mixing chamber. A hol low tubular portion 3 is provided on one side of the casing having a passage 4 through the inner wall thereof which coinmunicates with the interior of the float The 1: per end of this vertical, tubular portion is cliised by means of a plug the tubular portion 3 is secured a coupler member or valve casing 6, the upper end of which is in threaded engagement with the tubular member 3, and the lower portion of which is provided with screw threads and adapted to be secured in threaded engage widfil mcnt with suitable coupler member or sun To the lower end of ply pipe connected with a source of hydro carbon or combustible fluid supply. The coupler member or valve casing 6 has a central, axial opening or passage 8 leading therethrough, and controlled by suitable valve-mcchanism comprising a valve-operating lever 13, but which :mechanism may be of any desired suitable form adapted to per mit the valve to be raised by means of the float J and valve-operating lever when the hydrocarbon or combustible fluid becomes sufiiciently low in the float chamber to permit the float to so operate the lever 13 as to raise the valve. The float chamber is pro vided with an outlet opening 22 which is covered by a screen 23. This opening communicates with the inner passage 0 in the feed tube n by way of a passage 24 formed by a tube 25, one end of which is connected with'vtbp feed tube a and the other end of which 1"s'connected with the bottom of the casing and float chamber outlet 22 by means of a coupler member or screened cap and pipe-connecting. member 26. The -screensupporting cap 26 and pipe 25 thus form a passage leading from t e float chamber to the interior of the feed tube n. The feed tube n is provided at its upper end with a fluid supply nozzle 27 having combustible fluid supply passages or nozzle passages 28 Y which lead from the passage 0 into the miX- ing chamber 38 of the carhureter.

A throttle valve, which is, by preference,-

in the form of a butterfly valve 34, is rockingly mounted in the upper portion 1? of the casing upon a horizontal rock-shaft 35 which is journaledor rotatably supported in the casing (see Figs. 1 and 2). This throttle valve is adapted to be operated or turned to open or closed or any desired intermediate position to correspond with the speed of operation of the motor or engine in any desired, ordinary, or known manner and by means of operatingmechanism of any (16- mixing chamber by auxiliary hi h-speed air I inlet openings hereinafter described Mounted on the inside of and with its outer peripheral surface in sliding engagement with the inner peripheral surface of the tubular member 43, is an endwise movable tubular valve member 49 having a bottom or tapered enicsi wall portion 56 pro vided with main all inlet openings 57 there in, as indicated in Figs. 1 and 3. This endwise movable tubular member 49 is provided with a peripheral laterally projecting annir lar flange 59 at its lower portion adapted to close the main air inlet opening 60 which leads into the mixing chamber, and which opening is formed by the lower open end of t e tabular valve bushing 43 when the member 49 is in raised position, or in the position which it occupies when the throttle valve 34 is closed or when the device is open ating under lowepeed conditions, (see Fig 1). The flange 59 adapted to admit air through the opening (it) when the endwise movable valve member 49 is lowered so that said flange is below and out of engagement with the lower open portion of the valve bushing 0r rotatably mounted tubular valve member 43. A bottom eoni fill tubular portion or sleeve 39 upon and in fixed relation to the lower end of the inner tubular valve member 49, forms a tapered annular air supply iassage 41 leading from the air space 42 to t e mixing chamber 38 and which is at all times open. The rotatablv mounted valve member or bushing 48 is provided with any desired number of auxiliary high Speed air inlet )orts 47, as indicated in Fig. 3, and the en wise movable inner tubular valve member 49 is provided with a worrisponding number of auxiliary lii lrsprnd air inlet openings or ports 48 adapted to communicate with the ports 47 whrn the throttle valve 34 is in open positlo i, and the tubular valve member 4!) at one ("vllt'lblll of its movement for instance. in its low l'-' i position-*thus providing auxiliary air inl t passages leading through ports 47 and "i from the main air supply passage 45 into lllt' mixing chamber, when the dcvit'e is in operation under high-speed coinlitinns and the throttle valve 34- is open. The rotative valve member or bushing 43 is also providrd with a peripheral auxiliary air inlet ining (t3. and the inner valve lJIhlIlllfj or meinbor t! with a corresponding peripheral auxiliarv opening (lit for the admission of low+-poril air or auxiliary air to be used when thidrvi is in (narration under low specd 'ondili ns. said openings being adapted to i'e;1'i-ler or form an open auxiliary air inlet paswagz'n tor low-speed air when the openings or ports l7 and 48 for admitting higlrspued air are closed. The openings 55) and (d5 are adaptrd to lie (dosed .hy the movement 'of the endwise movable valve member ll) to the positi n which it. orcupics when the throttle valve Ill is open or. in other words, when the devi 'e is in operation under highspced (tillllllllllm An air inlet 'nissage (l? which is adaptrd to communicate with the o )enings (t3 and fill. when open, in provided with a valve (=23 adapted to"oe adyusted or operated by manna of a thumb nut 62), or other amiable means, to any desired position or regulating the effectual area of the opening (37 for adniitting low-speed air. The tubular rotativo valve member 43 which provided at its lower end with laterally projecting peripheral guiding lugs or arms 46 having spaces therebetween for admitting incon'iing air to the space or passage 45Qis adapted to be rotated by means of an operating stem or him die 5!) to any desired adjusted position, for regulating or rhanging the width of the higlrspeed auxiliary air passages formed by the ports 47 and 48 and without rhanging the low-speed air passage 67 leading to the ports 5 and tili,in a direction circumferentially of the tubular valve members 43 and 4t). Segmental shields or plates 5 and 54 are so mounted and movable with the stem 50 as to at all times close the opening in the casing through which the stem 50 extends, the segmental plate at being of resil ient material and adapted to form a spring which serves to yieldin 'ly hold the plate 5) in position to ('l(l.-t said opening" through Wllllll the stem 5t) extends The cyliiulrical valve member 4!) is supported by a conncrtiinr rod or plunger (31, the lower end of which is pivotally connected with said rylindri al valve member it by mrans of a horizontal pivot or shalt 'i (see Fig. l). and the upper cud of whi h is oprratiwly connected with the throttle :alvcill by means of lugs 2 which arc sot'lll tl lo the valvi' ill, and a horizontal pivot l! mounted in said lugs and in pivotal supp rt hm riitrng cnicnl itli the plunger or coir uni-ting rod l ljor by any desired t llllllllll rr ulin r nit-ans whirl! may be of any ordinary or woll known l'orm.

'lluendwisr movablo valve mrmbcr -'l.) is thus supported and adapted to be operated :uitoinatirally with or by means of the throttl valve 31 or simultaneonsly with the manual operation of the throttle val\e. -so as to upon the higtvsprcd auxiliary air inlet pasmigi-s to tho :ni thc l1'\v:-p -ed air inlet ports when the endwi:-. lnotublo \ulve number *1!) is in the position whirli it occupies at one extremity of its movement l'or instance, in lowered posiliou u'illi the throttle valve open. It obviously llows that the auxiliary liiglrspood air inlet ports will be closed and the lowspeed air inlet ports opened when the lhrotlltvalve is in closed position or the devine operating under low-speed conditions.

The regulation of the proportions of liquid lrvdrooarbons and air admitted and intermixed may thus be controlled by regulating or controlling the admission of air, and. the admis ion of hi lrspcr-d air and low-speed air through wparate or independent au lilo .t passages for such auxiliary highm r. air and low-speed air, res1')eetively, on y be regulated by separately ad ustable Jalating or controlling means, so that the xiup rhamber 3H and rlosc lOli 'or-casilng portions 7' which may be integral &

mixture or proportions of liquid hydrocarhens and air for high-speed conditions and for low-speed conditions, respectively, may be independently regulated, and may be varied with respect to each other as desired by separately adjustable l'neans.

A :arbnretcr constructed as above described is adapted to operate as set forth in the pending application above referred to, to which reference is made tor a more de tailed description of the device and the ar rahgement and operation of the parts above described.

A head, manifold, casing or conduit 70, for conductinq combustible fluid to the combustion cham er of an engine or to each of the combustion chambers or cylinders of a multiple-cylinder engine, is provided and connected with the main casing or body a of the carburetor, which latter may, as already suggested, be of any desired ordinary or known type. The head, manifold or casing, when in the form shown in the drawings, cdlnpriscs in its construction a neck portion 1? "and any desired number of branch pipes with the neck i or secured to said neck portion in any desired, suitable, or known manner, so as to form any desired number of conmiunicating or diverging connected passages or ,branch passages 72 all communicating with the main mixture outlet passage 71 formed by the neck or tubular portion 2', and each leading to or adapted to communicate with a different explosion chamber or cylinder.

The opposite or diverging ends of the tubular portions j of the manifold, head or casing are provided with suitable means tor connecting the passage or pznsages formed thereby with the combustion chamber or chambers, respectively, of im engine. This connecting means may consist of a pipe conling l secured to the branch pipe 7' and havmg internal screw threads m adapted to be secured in threaded engagement with a threaded pipe leading to a cylinder of. an engine, or with a suitable connecting sleeve, nipple. or pipe union member: The pipe coupling t for each of the branch tubular portionsor branch pipes j is connected with the tubular member-j in any suitable manner, for instance, by being mounted rotatably in engagement with an expanded end portion of the same. The casing or neck portion "7'. thus forms a main combustible fluid outlet passage which communicates with the mixmg chamber 38 and in which the throttle 'alve 34 may be mounted as indicated in the accompanying drawings.

A single valverontrolled passage comprising the passage 71 or passage portions 71 and 72 is ot' c urse sullicient tor a single cylinder motor, and may be used in conncc' tion with an auxiliary tube 73 or by-pass or l passage 73 for conductin lowspeed com l bustible fluid directly rorn the mixing l hamber and provided with a regnlating do "W0 constructed as described, or adapted to be adjusted independently of the main tbrottle valve which controls the high-speed combustible fluid passage. The connected but s pa rate and distinct mixture outlet branch passages or passage portions 72, however, are each adapted to lead to it ditl'crent one i oi a plurality or series of cylinders or explo ion chambers of a motor located at an c pml distances from the carburcter or combustible fluid supply, and which cylinders for this or any other reason may fire unequally or in all irregular manner. Or there may he a lock of uniformity, strength, or regularity in the explosions in one ormore chambers or cylinders, or relatively weak explosions in one or more cylinders coinpared with others, more especially when operatin at low-speed. It is therefore very desirable to provide simple and eflicient means whereby the flow of the mixture or combustible tluid to any cylinder or through any induction or combustibleflnid passage leading to any explosion chamber may be regulated with respect to and imlepeiidcntly of-any other cylinder or cylinder It is pan ticnlarly desirable to provide regulating means and passages adapted to enable the supply or flow of combustible fluid for operating a multiplc-cylinder motor, or other term of engine, at low-speed to be regulated indciwndieitl r of the valve mechanism for controlling the main mixture outlet or induction passage, through which the main supply oi combustible fluid passes to the cylinders f r operating at high-speed. It also desirable to. at the same time, provide a desired number of auxiliary passages or Ivy-passes having suitable independently adjustable means forregulating the flow of coml'iustible fluid for low-speed operation independently of the valvewontrolled main mixing chamber and through which the combustible fluid for operating under high speed conditions passes.

It is obvious that there may be as many passages 72 as there are cylinders to he supplied with combustible fluid from the carbureter with which the manifold .or casing is connected. For each branch passage. 72 or branch pipe or tube j in ex ess of a single branch passage or vipe, a tube 73 is provided, one end of which communicates with the portion of the mixing chamber located intermediate the throttle valve 34 and the air inlet passage or passages of the mixing chamber. or, lTl/fiilltl w rd n ith the mixing hamber proper. so as to form an auxi y combustible fluid disrhai gc passage r by pass 74 leading direitly from the mixing mixture outlet passage leading from thebranches and branch passage portions or lit operation of the throttle val e.

chamber around or independently of the throttle valve 34 into the mixture outlet passage or a branch portion of the mixture outlet passage at a point intermediate the throttle valve and the cylinder or combustion chamher with which such branch passage portion or branch pipe 1s to be connected, Each of these tubes ,73, Or the ay-pass Z4 formed thereby, is provided with means for regulating the effectual area or transverse area of such passage, or bypass. The regulating means here shown consists of an adjustable threaded regulating screw 75 mounted in threaded engagement-wither suitable similarly threaded sup )ort or boss '76 uponthe corresponding auxi iary or bypass tube and in position to extend into the passage 74 formed by the tube, so that by turning the screw in one direction the ofi cctual area or transverse area of the passage or bypass formed by the tube is reduced, and by turning the screw in the opposite direction the riliectual area or transverse area of the passage is increased to any desired extent, liar itcd only by the maximum size or area oi the passage. A. seat. T6 in the portion of ca h tube opposite the side ihrlutgh which the screw extends adapted to admit and to tit closely in engagement uith the end oi the screw when the latter is in pass-agel sing" position so that the llow of fluid thou the passage may be ntirely prewar-EU}; ub'i'i desired.

From the forpgoing it will be seen that each of the tubes 73 forms an auxiliary comhustible fluid discharge passage leading from a portion of the mixing chamber or outlet passage of the carburetor intermediate the throttle valye and the air inlet opcning or openings of the mixing chamber. and

that the auxiliary discharge pas e or by- 'vasses thus formed each coznniuni x with a different diverging branch passage or branch portion of the main valvcrontroiled mixture outlet passage, and that each of the auxiliary passages adapted to rommunirate with a separate or distinct combustion chamber, independently of the position or The auxiliary passages thus formed by the tubes 73 are adapted to conduct all or substantially all of the combustion fluid which is to be used when the device is in operation under low-spccd conditions or when the throttle valve is closed. In other words, each of the auxiliary passages thus formed by the tubes 73 is adapted to form a conduit or by-pass for low speed combustible fluid, and the regulating means or screws 75 fo the auxiliary passages or bypasses are adapted to enable the clfectual area or fiow of combustible fluid through the auxiliary passages to be con trolled or regulated independently of the throttle wire, and the tr otilc valve may l e entirely closed, it dealt-rm, during the op eration of the device, when the engine to be supplied is operated at low-speed, or, in other words, when the device is in operation under low-speed conditions.

I claim:

1. In a device of the character described, the combination of a mixing chamber provided with a plurality of mixture discharge passages adapted to communicate with t e cylinders of an internal combustion engine, a throttle valve located intermediate of the mixing chamber and said mixture discharge passage, and a plurality of auxiliary mixture discharge passages communicating with said mixing chamber and with each of said discharge passages intermediate of the throttle valve and the cylinders of the engine.

2. In a device of the character described, the combination of a mixing chamber provided with an air inlet opening, a plurality of branch mixture outlet passages communicating with the cylinders of an internal combustion 'engine, a throttle valve adapted to control the discharge of the mixture from d mixing chamber, and a plurality of auxary mixture outlet passages connecting each of said branch passages with the mixing chamber intermediate of said throttle valve and the outlet opening of said mixing chamber, and a valve in each of said aux: iliary passages.

3. In a device of the class described, the t ltl'lllinittlOll of a casin forming a main lizzid passage, a thrott e valve rotatively mounted on the inside of the main passage, 100 a plurality of branch pipes all communirating with a portion of the main passage located on one side of the throttle valve, and a plurality of auxiliary tubes each having its outlet end connected with a separate 105 branch pipe, and each having its inlet end communicating with the interior of a p0r tion of the casing located on the opposite. side of such throttle valve from the )ranch pipes.

l. In a device of the class described, the combinatioh of a head. forming a main combustible fluid passage having an inlet opening at one end adapted to communicate with a mixin chamber and provided with a plu- 5 rality o diverging branch passages communicating with the main passage, a throttle valve rotatively mounted on the inside of the main passage intermediate said inlet pening and said branch passages, a plu- 120 rality of tubes each connected at one end with the main passage at a point intermediate the valve and the inlet end of the main passage and each connected at its opposite end with a separate branch passage, inde- 25 pendently adjustable regulating means for each by-pass for controlling the effectual area thereof, a main carburetor casing; and means for connecting said head wit the main casing of the carburetor.

in ln a \llVlLU of the class described, the i winliination of n mixing chamber, a casing forming a mixture outletussage for said I mixture elnunli el', and provided with a plu-i rnlitv of (lisrlnn'ge openings, at plurelity'ofii lunnwh pipes ,-onnected with said discharge openings of the casing, each of said branch I pipes being adapted to communicate with a separate combustion ehpmber of an engine, a throttle valve located intermediate seidi casing and the mixing-chamber, a plurality. of hy-pass tubes communicating with the mixing chamber and with euch 'nf said pipes, and an independently controlled valve in ouch of said by-pass tubes.

In testimony that I claim the foregoing as my invention I affix my signature in the presence of two witnesses, this 3rd day of April, A. D. 1913.

WILLIAM OTTAWAY.

Witnesses C. H. GREENE, F. E. SPERRY. 

